阶跃型多模光纤参数的理论误差及其修正方案

对波动理论和射线理论算得的散射图进行了比较,找出了特征散射角的差异.在后向散射区中找出了修正这种差异的经验公式,在前向散射区中找出了差异较小的区域。提出了综合利用前、后向散射图,测定阶跃型多模光纤结构参数的一种修正方案,理论误差较小,容易鉴别特征散射角。     

海南万宁礼纪青梅林（续完）

海南万宁礼纪青梅林（续完）梁淑群，林英，杨小波，黄世满，符史新，谢国干（海南大学）礼纪青皮林自然保护区植物名录面类植物门ＰＴＥＲＩＤＯＰＨＹＴＡ１松叶蕨科Ｐｓｉｌｏｔａｃｅａｅ１）松叶蕨Ｐｓｉｌｏｔｕｍｎｕｄｕｍ（Ｌｉｎｎ，）Ｇｒｉｓｅｂ２水龙骨科Ｐ...     

爆生气体作用裂纹传播长度计算

大不偶合系数的炮孔装药爆后．气体静压是产生裂纹的主要原因。本文从强度理论和脆断理论两方面对此情况下裂纹传播长度的计算方法进行探讨。同时还讨论了裂纹传播过程中的速度变化规律。     

向量向一点简化理论的拓广

本文尝试将静力学中向量向一点简化的思想推广用于动力学理论中．通过建立动量集的概念为中介．重新解释了动量定理与动量矩定理的内涵，深入揭示了动力学的本质．即力与运动之间的关系。     

牙周炎病原菌的分离鉴定及药敏试验

从７例牙周炎患者病料中分离到６株专性厌氧菌和若干株兼性厌氧菌。通过形态学观察，微量生化试验以及用气相色谱分析其代谢产物等方法，已将６株厌氧菌鉴定到种。随后用江西中医学院研制的数种治疗牙周炎的药物对其中几株主要病原菌做了体外药敏试验，比较了５种药物成分对牙周炎病原菌的作用；测定了５种药物配方对５株厌氧菌的ＭＩＣ及ＭＬＣ。此外，还探索了药液的牛津杯法在厌氧菌抑菌试验中的应用。     

QHCSJ－I型汽车离合器超速试验机的研制

介绍了确保高速旋转构件工作可靠性的超速试验技术，国内外超速试验机的产生、发展和应用情况。重点介绍了ＱＨＣＳＪ－Ｉ型汽车离合器超速试验机在真空筒内采用环形动态防爆圈技术；在传动系统中采用柔性轴技术；在动平衡系统中采用陀螺系统与磁力阻尼和摩擦阻尼相结合的技术以及在操作策略上采用计算机与主机的隔离控制方案，使整个台架试验机工作可靠，使用安全。     

幼儿、儿童、少年足弓指数测定及其分析

本文采用较能客观反映真实足弓的指标——足弓指数,对幼儿、儿童和少年足弓发育情况进行研究。结果表明:幼儿时代至中学初中的少年时期,是足弓发育时期,在这一时期,足弓指数随年龄增长而增长,扁平足发生率则随年龄增大而减少;儿童时代和初中的少年时期是踏跳(用力)腿逐渐形成的阶段,其足弓指数平均值大于非踏跳(用力)腿,表明小学生、初中学生多进行跑跳练习,有助于儿童、少年足弓的正常发育。     

Abnormalities of meioses in male reciprocal hybrids between the Hiroshima and Ichinoseki populations ofRana japonica

In order to elucidate cytogenetically the cause of male sterility in intraspecific hybrids ofRana japonica, the behavior of chromosomes in the first meiosis was observed in spermatocytes from male reciprocal hybrids between two populations from Hiroshima and Ichinoseki. In the parental Hiroshima and Ichioseki populations, 2530 (96.7%) meiotic spreads had 13 bivalents and 78 (3.0%) contained 12 bivalents and two univalents, whereas in reciprocal hybrids only 337 (7.0%) contained 13 bivalents and the other 4445 (93.0%) had 2–26 univalents. A total of 31647 (93.4%) bivalents was ring-shaped and the other 2234 (6.6%) were rod-shaped in both parental populations, whereas in reciprocal hybrids 26352 (57.1%) and 19819 (42.9%) bivalents were ring- and rod-shaped, respectively. These results show that meiotic chromosomes of reciprocal hybrids are characterized by a remarkable increase in univalents and rod-shaped bivalents.     

Protective effect of Shigyaku-to,a traditional Chinese herbal medicine,on the infection of herpes simplex virus type 1 (HSV-1) in mice

The antiviral activity of Shigyaku-to (TJS-109), a traditional Chinese herbal medicine, was investigated in mice infected with herpes simplex virus type 1 (HSV-1). TJS-109 is a combination of the medicinal plant extracts fromZingiberis siccatum rhizoma,Aconiti tuber andGlycyrrhizae radix in a specific proportion. Mice infected with a 10 LD₅₀ dose of HSV-1 were treated with TJS-109 orally at doses of 1.25 to 20 mg/kg 2 days before, and 1 and 4 days after the infection. The treated groups had 80% (1.25 mg/kg), 40% (5 mg/kg) and 23% (20 mg/kg) mortality rates 25 days after the infection as compared with a 100% mortality rate in control mice treated with saline. When HSV-1 infected mice (recipients) received CD8⁺T cell fractions derived from spleens of mice treated with TJS-109 (donors), 70% of recipients survived, as compared with 0% survivors in the groups of mice treated with saline, B cell fractions, CD4⁺ T cell fractions or macrophage-enriched fractions prepared from the same donors. TJS-109 did not show any virucidal activities against HSV-1 or any virostatic activities on the growth of HSV-1 in Vero cells. These results suggest that TJS-109 protected mice exposed to lethal amounts of HSV-1 through the activation of CD8⁺ T cells.     

A morphometric study of spermatogenesis in the testes of mice of a senescence accelerated strain

The morphometric parameters of spermatogenic cells in a mouse strain prone to accelerated senescence (SAM-P), a novel murine model of spontaneously promoted aging, were compared with those of a SAM resistant strain (SAM-R) after birth until 40 weeks (mean life span of SAM-P). A mixture of gonocytes and spermatogonia were present in the testis in 1-week-old mice, and no gonocytes were observed in 2-week-old mice. At 6 weeks of age, the absolute number of spermatogonia in SAM-P was 27% greater than that in SAM-R, whereas the cell number in 40-week-old SAM-P was 17% less than in SAM-R. Primary spermatocytes were first observed in 3-week-old animals, and the cell numbers in SAM-P at 3, 5 and 6 weeks were 78%, 31% and 25%, respectively, greater than in SAM-R, whereas the cell number in SAM-P at 40 weeks was 30% less than SAM-R. Round spermatids were first observed in all SAM-P at 4 weeks old, but 20% of SAM-r had no spermatids and the rest had only a few. At 5 and 6 weeks old, the absolute numbers of round spermatids in SAM-P was about 34% and 41%, respectively, greater than in SAM-R, whereas the cell number in 40-week-old SAM-P was about 34% less than SAM-R. These results indicate that testicular maturation begins at an earlier age in SAM-P than SAM-R. Furthermore, at the age of 40 weeks signs of testicular deterioration are evident in SAM-P mice only